Influence of matrix modifier on the content determination of arsenic and mercury in Rhizoma pardis.

[Objective] This paper was to discuss the method for the determination of trace elements arsenic and mercury in Rhizoma paridis, which provided a reference for the evaluation system of toxic and side-effect of R. paridis. [Method] GFAAS was used, matrix modifier of nickel, palladium chloride dosage, acid medium, ashing temperature, atomization temperature and other test parameters were optimized, and the influence of matrix modifier on the content determination of arsenic and mercury in R. paridis was explored. [Result] The results showed that the matrix modifier Ni(NO3)2 and PdCl2 can not only improve the ashing temperature and atomization temperature of arsenic and mercury, but also improve the sensitivity and precision of determination, and the reproducibility was good. [Conclusion] This method is rapid and reliable. It is a simple and effective method for the determination of trace elements arsenic and mercury in R. paridis.